Typewriting machine



Jan- 21, 19 J. J. KITTEL TYPEWRITING MACHINE Filed Nov. 12, 1938 i 6 Sheets-Sheet 1 INVENTOR John J? lfl'ffel BY 7 w 1 Afionhm a Jan. 21, 1941. J. J. KITTEL TYPEWRITING MACHINE I Filed Nov. 12, 1938 s Sheets-Sheet 2 Jan; 21, 1941. J. J..l (lTTEL I 'rYPmI'rma Imam:

Filed Nov. 12. 1938 6 Sheets-Shet s N Q S km vw mm QN m llll l-III Ill INVENTOR 115/111 0: lfif-l-el 1 ATTORNEYS Jan. 21, 1941. J. J, KITTEL TYPEWRITING MACHINE Filed Nov. 12, 1936 6 Sheets-Sheet 4 John J.' Kifi'e/ Jan. 21, 1941. J, J, Krr'rEL TYEwRITma momma Filed Nov. 12. 1938 6 Sheets-Sheet 5 GGGGG'GGG 0@00000 0000.

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. mm h. nun-Inn Mu Hui- Hun h. S3 1 8N Now mm 5w N Jan. 21,1941. J. J. KITTEL TYPEWRITING mcfimz Filed Nov. 12. 1938 6 Sheets-Sheet 6 QM a n. 3 1

INVENTOR John ,7: hifte/ BY 6 v a ATTORNEYS Patented Jan. 21, 1941 UNITED STATES ryrnwmrmo MACHINE John J. Kittel, St. Albans, N. Y., assignor to Royal I Typewriter Company, Inc., New York, N. Y., a

corporation of New York Application November 12, 1938, Serial No. 240,180

Iii Claims.

This invention relates to typewriting machines, and more particularly to stops for arresting or limiting movement of typewriter carriages in letter-spacing or return directions, and to mechanism for adjustably positioning such stops.

It is usual to provide cooperating stop elements on typewriter main frames and, carriages for arresting or limiting movement of the carriages either for fixing the writing margins or for positioning the carriage for tabulating operations. The illustrative embodiment of the invention to be described comprises a typewriter including stops arranged to arrest movement of the carriage at a predetermined point or predetermined points, and-mechanism for adjultably positioning a stop or stops. It will be understood, however,

that the invention may be adapted for more 30 by merely moving a control device mounted on the main frame without its being necessary first to set the carriage in any particular position on the frame, then moving the carriage to the desired margin position, and then retracting the 5 control device.

Another object is to provide margin stop setting mechanism by means of which a margin stop may be set in desired carriage-stopping position by shifting the carriage to the desired margin position, then moving a control device mounted on the main frame, and then retracting the control device.

A further object is to provide mechanism of the character referred to which is of simple con- 5 struction, easyto operate, and rapid in its action in correctly positioning the stop.

Other objects will become apparent from a reading of the following description, the appended claims, and the accompanying drawings,

50 in which:

Figure 1 is a fragmentary transverse vertical sectional view of a typewriting machine in which adjustablemargin stops are mounted on the carriage and are associated with, stop-setting mecha- 55 nism embodying the invention in one form;

Figure 2 is a vertical sectional view taken on the line 22 of Figure 1 with some parts omitted and some parts shown in elevation;

Figure 3 is a fragmentary view mainly in elevation and showing mechanism embodying the in- 6 vention as it appears when looking from the front toward the rear of the typewriter. and drawn on an enlarged scale;

' Figure 4 is a transverse vertical sectional view taken on the line 4-4 of Figure 2 and drawn on an enlarged scale;

Figure 51s a top plan view of the two adjustable margin stopsand associatedstop-setting control bails shown in Figures 1 to 4 inclusive;

Figure 6 is adi'storted diagrammatic plan view of the resilient stop-urging band and its mounting means shown in Figures 1 to 4 inclusive;

Figure 7 is a view in front elevation of a modification of the embodiment shown in Figures 1 to 5 inclusive;

Figure 8 is a view in front elevation of another modification of the embodiment shown in Figures 1 to 5 inclusive, and drawn on a reduced scale;

Figure 9 is a fragmentary top plan view of a typewriter in which adjustable margin stops are mounted on the main frame and are associated with stop-setting mechanism embodying the invention;

Figure 10 is a fragmentary end elevation looking in the direction of the arrow Ill in Figure 9 and drawn on an enlarged scale Figure 111s a vertical sectional view taken on y the line i l-ll of Figure 9 and drawn on an enlarged scale;

Figure 12 is a detailed vertical sectional view taken on the line l2l2 of Figure 9 and drawn on an enlarged scale and with some parts of a left hand margin stop omitted; and

Figure 13' is a fragmentary top plan view of a modification of the embodiment shown in Figures 9 to 12 inclusive.

Mechanism constructed and arranged to operate in accordance with'the invention may be embodied in typewriting machines of various kinds. I 45 For typewriters in which adjustable stops are supported on the carriage (Figures 1 to 8 inelusive) r For the purposes of illustration, one form of mechanism embodying the invention is shown in Figures 1 to 8 inclusive as applied to a Royal Standard typewriter. The typewriter shown includes the usual main frame A, carriage B, platen C, combined platen and carriage locating scale D 55 supported on the carriage, and type bar guide E. The main frame includes a rear wall I, end walls 2 and 3, and a front wall or cover Q. Mounted on the main frame is an escapement frame 5 supported on a-fixed track 6, which, through ball bearings l, mounts a carriage bearing rail 8 extending between and connecting carriage en'd plates 9 and it.

The carriage B is urged to the left in letter space direction by a spring motor (not shown) of a known kind, and is controlled by escapement mechanism supported on the frame 5. The escapement mechanism also may be of a known kind, and only so much of it is shown in the drawings as may be of assistance in understand-e ing the present invention. As shown, the escapement mechanism includes an escapement wheel ii and an escapement pinion i2 journalled on the frame 5, the pinion i2 being arranged to mesh with a toothed escapement rack l3 carried by a bar it mounted on the carriage by means (not shown) permitting the bar and rack It to be raised out of engagement with the pinion for rendering the escapement mechanism ineffective.

Central pointers l5 and it formed on the type bar guide E cooperate with the scale D for assisting the operator to position the carriage. A

center stop ll of known kind is pivotally mounted as at it on the frame wall l, and a line lock lever i9 is pivotally mounted as at it on the center stop ii in a known manner. A tabular stop mounting assembly F is supported on the carriage, being connected at its opposite ends to the end plates 9 and ill by studs 2i and 22 respectively.

Adjustable stops are supported and normally locked in fixed position on the carriage for cooperation with the center stop I l to arrest or limit movement of the carriage, the carriage-mounted stops being urged constantly toward the center stop. Means are provided for quickly and easily unlocking the carriage-mounted stops so as to permit them to be moved by the constant urge until they contact the center stop, after which the carriage is moved to the desired margin po- I sitions and the carriage-mounted stops then are locked to the carriage.- In the form shown, right and left hand margin stops, respectively designated G and G, are mounted on and for adjustment along a margin stop rod H having transverse teeth 23 spaced. along its upper face and being supported on and between the carriage end plates 9 and id.

The right hand margin stop G includes a tubular body 26 formed with a lateral extension 25 which receives an adjustable abutment screw 26, adapted to cooperate with the line lock lever l9 and center stop ii, a set screw 21 serving to hold the abutment screw 26 in adjusted position. A latch generally designated 28 is pivotally mounted as at 29 on the body 2 3, and is provided with a nose 30 adapted to fit between adjacent teeth 23 on the margin stop bar H for releasably looking or securing the stop G in adjusted position on the bar H. The latch is formed with a horizontal arm 3! extending toward the center of the carriage, and a spring 32 held in place by a stud 33 is interposed between the body 24 and the horizontal arm 3| for yieldably urging the latch nose 30 toward the teeth 23 of the rod H. A roller 34 is mounted on the latch between the pivot 25 and nose 30 and cooperateswith mechanism located on the main frame A to release the latch 28. It may be desirable sometimes to release the latch independently of such mechanism, and accordingly the latch arm is provided with an upstanding finger piece 35, manual depression of which will raise the latch nose, permitting th stop G to be moved along the rack bar.

The construction of the left hand margin sto G is similar to that of the right hand stop G just described, the only difference being that it is reversed as to right and left hand. Accordingly, no detailed description of the left hand stop G is necessary. The reversely similar parts of the two stops G and G are designated by corresponding reference characters, the characters applied to the stop G, however, being primed.

Means are provided for constantly urging both stops G and G inwardly toward the center of the carriage and towards each other. In the form shown in Figures 1 to 6 inclusive, the stopurging means comprises a long resilient contractile coil spring band I which advantageously may be of the kind described in detail in the copending application of Henry J. Hart, Serial -No. 232,869, filed October 1, 1938, now Patent No.

2,208,367, issued July 16, 1940. One end of the spring I is. connected to an ear 36 on the body 26 of the stop G, the spring thence extending to the left as at 31, and around a sheave or roller 38' an-ti-frictionally journalled on a bracket 39' secured to the end plate Q by a screw $6. The spring then extends to the right as at M and around a sheave or roller 38 anti-frictionally journalled on'a bracket 39 secured to the end plate ill by a screw all so as to rotate about an axis inclined with respect to the axis of rotation of the roller 38. Thence the spring extends to the left as at 62, and is connected to an ear 36' on the body 25 of the stop G. The length of the spring I is such that, when the stops G and G are positioned near the center of the carriage, the spring will be in its most contracted position but will be under substantial tension.

To provide the desired free journalling of the rollers 38 and 38', they are mounted by antithe bar H, permitting the spring I to draw-the stop toward the left until arrested by the center stop H. In the form shown, the control means includes an actuator or ball J which, as viewed in Figure 4, is of generally reversed L shape having rearwardly extending arms 15 and t6 pivotally mounted as at 3? and 68 respectively on the tabular stop assembly F. The bail J includes a horizontally extending ledge or rail 49 which underlies the path of the roller 36 on the stop G. Normally, the bail J is in lowered position with the ledge at below and out of contact with the roller 3 A projection Ed on the bail arm 46 cooperates with the stud ill at the left hand 'end of the tabular stop assembly? for limiting stop G from the stop bar H. When the latch is thus released, the spring I will pull the stop G.

to the left until the abutment screw engages is adapted to cooperate with the latch roller 34 irrespective of the position of the stop G relative to'the carriage and frame.

In accordance with one feature of the invention, operating mechanism mounted on the main frame A and normally not operatively connected'to the bail J is operable for connecting with and lifting the bail and thereby releasing the latch 28, irrespective of the position of the carriage on the frame. In the illustrative embodiment shown in Figures 1 to 6 inclusive, the operating mechanism includes a reciprocable push link 5| mounted for vertical sliding movements by means of ;a shouldered screw 52 extending through a slot 53 in the push link and having threaded engagement with a bracket plate 54 secured to the escapement frame 5. A roller 55 journalled on the upper end of the push link 5| is adapted, when the link is raised. to engage the bottom of the bail ledge 49 and swing it upwardly into engagement with and to lift the latch roller 34 to release the latch 28. The lower end of the link 5| is pivotally connected as at 55 to one arm 5! of a lever 58 which is .pivoted as at 59 on the frame rear wall I. The other arm 58 of the lever 58 is received by the bifurcated end 5| of one arm 52 of a bell crank lever 53 pivotally mounted as at .54 on the frame side wall 3. The other arm 55 of the lever 63 is pivotally connected as at 55 to, a thrust bar 51 which extends forwardly from the rear part of the typewriter and passes through and beyond an opening 58 in the frame front wall 4, the bar 51 being provided at its outer end with a finger key 58. Preferably, the push bar 51 is formed with an offset or vertically extending portion Ill adapted to abut against the inner face of the front wallor cover 4 to limit forward movement of the push bar, and consequently to limit movement of the lever 53, the lever 58, and the push link 5| under the urge of a spring 1| connected between a stud" on the lever 58 and an ear 13 on the main frame. It is apparent that, by pushing the bar 61 rear- .wardly, the lever 53 will be rocked in a clockwise direction as viewed in Figure 1, the lever 58 will be rocked in a clockwise direction as viewed in Figure 2, and the push link 5| will be raised. The bar device 51 is formed with a notch 14 adapted to receive the upper edge of the opening 58 to permit the bar to be releasably set or locked in pushed-in position.

When it is desired to set the margin stop G in a position in which it will maintain a right-hand margin equivalent to, say, seventy letter spaces on the typed sheet, the push bar 51 will be pushed rearwardly so as to rock the bell crank lever 55 me. clockwise direction as viewed in Figure 1 and to rock the lever 58 in a clockwise direction, as viewed in Figure 2, so as to raise the lift link 5|. As the lift link 5| is raised, the roller 55 at' the top'of the lift link will engage .the ledge of the bail J so as to swing the bail upwardly, causing the ledge 48 to engage and lift the roller 34 on the latch 28, thereby disengaging the latch nose 35 from the toothed bar H. The push rod Bl may be releasably locked in its pushed-in or latch-releasing position by raising it slightly, so

that the upper edge of the opening 58 is received in the notch 14, thus rendering it unnecessary for the operator to hold the push rod inwardly against the urge of the spring while the carriage is being shifted to the desired margin position. The spring I .then will draw the margin stop G to the left until it is arrested by "the line lock lever l8 and center stop N. If the carriage B is moved either to the right or to the left, the stop G will be held up against the line lock lever and center stop by the spring I. To set the stop G, the carriage is moved to the position in which the marking '70 on the bottom of the scale D registers with the pointer l5 on the type bar guide E if the-typewriter is set for lower case typing, or registers with the pointer l5 on the type bar guide E if the typewriter is set for upper case typing. After the carriage has been moved to this position, the push rod 51 is retracted, thereby permitting the lift link 5| to be lowered by the spring H and causing the bail J to move down to the position shown in Figure 4, so as to permit. the nose of the latch 28 to engage the toothed bar H,'t hereby locking the stop G in the desired position. It is apparent that, if the carriage thereafter is moved to the left during the typing of a line, the abutment screw 25 on the stop G will engage the line lock lever l9 which, in connection with the center stop l1, will arrest movement of the carriage and fix the margin at seventy letter spaces.

Similar control means is provided for releasing the latch 28 of the margin stop G to permit setting of the latter for fixing the desired left-hand margin. The control means associated with the stop G includes a bail J, which, as viewed in Figure 4 is-reversed with respect-to the bail J, that is, it is of L shape, whereas thebail J is of reversed L shape as previously stated. Also the 7 arms 45". and -45' of the bail J are somewhat longer than the arms 45 and 45 of the bail J, so as to position the bail J' in front of the bail J. Operating mechanism associated with the bail J includes a lift link 5|, lever 58, lever 53', and push bar 51, all of which are similar in construction and relative arrangement to the lift link 5|, lever 53, lever 58, and push bar 51, previously described. Accordlngly no detailed description of the bail J and'associated operating mechanism is necessary. The parts of the bail J and associated mechanism are designated by reference characters corresponding to those designating similar parts of the bail J and its associated operating mechanism, the reference characters applied to the parts of the bail J and associated mechanism however, being primed. The operation of the push bar 51', the bail J, and associated mechanism for releasing the latch 28 is similar to the operation of the push bar 51 and ball J for releasing the latch 28. It may be noted, however, that the abutment screw 25' on the stop G is adapted to engage directly with a buffer 15 pivotally mounted as at 28 on the line lock lever, a buffer. spring 15 connected to the buffer 15 and to'the center stop H (at a point not shown) serving to cushion the impact of the stop G against the center stop.

Assuming that it is desired to set the left hand margin at twenty letter spaces, and the right hand margin at seventy letter spaces, both push bars 51 and 51' will be pushed rearwardly, there by releasing the latches 28 and 28' and permitagainst further movement under the urge of the spring I. The carriage may then be moved until the pointer I5 or I6 registers with the markingv the marking "70 on the bottom of the scale D, r

and the push bar 57 is released and moved forwardly so as to efiect locking of the stop G to the bar H by means of the latch 28. The two stops G and G will then be set so as to maintain the properleft hand and right hand margins on the typed sheets.

Alternatively, the stops may be set in the following mann-er. First, the push bars El and 67' are pushed rearwardly .to'release the latches 23 and 28'. The carriage is then moved to its extreme right hand position, which will effect positioning of the stop G at its extreme outer or left hand position on the rod H. The push rod M is then moved forwardly to effect locking of the stop G to the-rod H. Thereafter, the carriage is moved to its extreme left hand position so as to-locate the stop G adjacent the right end of the rod H, and the push rod 61 is then returned to its forward position to effect locking of thestup G to the rod H. Then the carriage is moved until the pointer I5 or I6 registers with 'the lower scale marking 20, and the push rod 67 is pushed rearw-ardly to .unla'tch .the stop G so as to permit the spring I to pull the stop G to the right until arrested by the bufier I5 and the center stop IT. The lever 67' will 'then'be returned to its forward position to effect locking of the stop G to the margin stop rod H in the desired position. The carriage is then moved to the left until the pointer I5 or IE registers with the lower scale marking '70, and the push rod 6'5 is pushed rearwardly so as to unlatch the stop G and permit the spring I to draw the stop G to the left until. it is arrested by the line lock lever I9 and the center step ii. Finally the push rod Bl is returned to its forward position, effecting locking of the stop G to the bar H in the desired position.

The modified embodiment of .the invention shown in Figure '7 is particularly adapted for use in connection with typewriters having very long carriages, but may also be used with carriages of the usual length. Figure 7 shows the invention as embodied in connection with a long carriage B which may, except as regards its length, be similar to the carriage shown in Figures 1 to 6 inclusive. Accordingly parts of the carriage, the margin stops, and stop-operating mechanism shown are designated by reference characters the same as the characters designating corresponding parts in Figures 1 to 5 inclusive. In the modification, a spring motor powered drum or barrel 'I'l is journalled as at 18 on the left hand end of the carriage, and a cord or flexible band "I9, which may itself be non-expansible, is partially wound on the'drum and has an unwound end portion Bil extending past the left margin stop G, and is connected to the ear 36 on the right margin stop G. Similarly, a spring motor powered drum or barrel I1 is journalled as at 18" on the right hand end of the carriage, and a cord or band 19' partially wound on the drum'll' has its unwound end portion extending past the right margin stop G for connection to the ear 36' on the left mare gin stop G. The arrangement is such that the drums TI and 11. respectively urge the stops G and G toward the center stop ll. Positioning and locking of the mar-gin stops in addusted positions may be effected with the cooperation of suitable control mechanism such as the mechanism described above with reference to Figures 1 to 5 inclusive.

In the modification shown in Figure 8 only the left hand margin stop G is adapted to be set by mechanism such as that previously described. the right hand stop K being set manually. Such an wangement is satisfactory for many classes of work wherein one margin on the typed sheet does not have to bereset as frequently as is necessary with respect to the other margin. In this embodiment a spring motor pcwered barrel or drum BI is shown as being joumalled as at 82 on the left hand end of the carriage B. A cord or band 83, which itself may be non-eXp-ansible, is partially wound on the drum and has its unwound end portion extending to the rig-ht past the margin stops G and K as at 84, then around a pulley B5 journalled as at 86 on the carriage end plate 59, and. then is extended back to the left as at N, past the margin stop K for connection to the ear 36' on the margin stop G. The arrangemen t is such that the barrel or drum 81 constantly urges the stop G toward the center stop. Positioning and lock-ing of the stop G in adjusted position may be effected with the cooperation of suitable control mechanism such as the mechanism described above, with reference to Figures 1 to 5, inclusive. A right hand margin stop K is mounted for adjustment along the toothed bar H and is provided with a latch 88 pivotally connected as at B9 to the latch body and having a nose Sill adapted to engage teeth on the bar H. A spring 9i urges the latch nose into engagement with the teeth, and a finger piece 92 extending well above the bail J provides for easy manipulation of the latch during manual positioning of the stop K.

For typewriters in which adjustable stops are supported on the main frame (Figures 9 to 13 inclusive) Figures 9 to 12 inclusive show a form of stopsetting mechanism embodying the invention and adapted more particularly for use in typewriters having adjustable margin stops carried by the main frame and cooperating stop means fixed to the carriage. Only such of the usual or known ypewriter structure as may be of assistance in understanding this embodiment of the invention is shown. The known structure includes a main.

frame L on which a carriage M equipped with a platen or cylinder N m mounted for letter-spacing and return movements. A pointer 0 fixed to the carriage cooperates with a carriage-positioning scale P mounted on the main frame for indicating the letter space position of the carriage. A lever I95 pivot-ally mounted as at I02 on the carriage M is provided at its right hand end with an upstanding finger piece I03, and at its left hand end is formed with a projecting stop I04 which cooperates with a projection I05 on a margin stop generally designated Q mounted to slide on a front tie rod R and a rack bar S, both mount ed on the main frame. The margin stop Q cooperates with the stop projection I04 on the carriage for fixing the left hand margin on the typed sheet when the carriage is moved to the right. By depressing the finger piece I03, the lever I BI may be swung to move the projecting stop I04 upwardly, so that it may clear the stop I 05 to tion I06 fixed to the carriage is adapted to oooperate with astop plate I01 on a margin stop T mounted to slide on the front tie rod R and a rack bar U, both carried by the main frame, so as to fix the right hand margin on the typed sheet when the carriage is moved to the left. The margin stops may be provided with pointers (not shown) adapted to cooperate with the scale P for assisting in, date ning the positions in which the stops should be set in order to fix desired margins on the typed sheet.

In accordance with the present invention, the margin stops Q and T are so constructed and arranged as to be urged respectively towards the stops I04 and I06 under the" control of mechanism entirely carried by the main frame. The urging of the stops Q and T is efiected, in the form shown in Figures 9 to 12 inclusive, by a spring'band V which is connected at one end as at I08 to the margin stop Q, thence extending to the left as at I00 around a pulley I I0 journalled at I II on the main frame, thence to the right as at H2 and around a pulley II3 journalled as at H4 on the main frame, and thence to the left as spring V, a latch Iii is pivotally mounted as at M3 on the stop Q and is provided with a nose IIO constantly urged into engagement with teeth on the bar S by means of a spring I interposed between an arm I 2| on the latch and an abutment I22 on the body of the stop Q. Afinger piece i23 fixed to the arm I2I is provided for manually releasing the latch Hi, and a roller 24 journalled on the arm I2I cooperates with mechanism, to be described, for releasing the latch to permit the spring V to 'draw the stop toward the left, The mechanism for operating the latch is mounted entirely on the main frame, and includes a bail or tracker bar I25 which extends longitudinally of the main frame andnormally is disposed substantially in a vertical plane. The tracker ,bar I25 is provided with mounting arms I26 and Hi which-are pivoted respectively as at I20 and I29 on brackets H30 and I3I on the main frame. The arm I2! is offset as at I32 and is provided with a longitudinal extension I33 terminating at its end in a vertical extension I34 at the top of which is a forwardly projectingfinger lever device I35. A spring I36 interposed between the vertical extension I34 and a limiting stop I3I urgesthe tracker bar to the position shown in Figures 9, 10, and 11, wherein it is out of contact with the roller I24.

In operation, when it is desired to fix the left hand margin on the typed sheet, the finger lever 135 is depressed so as to rock the tracker bar in a counterclockwise direction as viewed in Figure 11, thereby causing the upper portion of thetracker bar to engage the latch roller I24, moving it to the left as viewed in Figure 11, and thereby disengaging the latch nose 3 from the toothed rack bar S. Disengagement of the latch from the bar S will result, immediately inmovement of the margin stop Q toward the left under the urge of the spring V-until the stop projection I05 on the margin stop Q engages and is arrested by the stop projection I04 on the carriage. The carriage is then moved to the desired limiting stop lat on the main frame.

fixing the left hand margin at the desired point.

In the normal or state of rest position of the tracker bar I25, a considerable clearance or space is provided between the bar and the roller I24, thus preventing accidental releasing of the latch Ill.

To releasably secure the stop T in adjusted position on the mainframe against the urge of the spring V, a latch I30 is pivotally mounted as at I39 on the margin stop T, and is provided with a nose I40 urged into engagement with the toothed bar U by means of a spring MI. The latch is provided with an arm M2 at the outer end of which is a finger piece E33 by means of which the latch may be manually released when it; is desired to set the margin stop T manually.

Also at its outer end, the arm I42 is provided with a roller I44 adapted to cooperate with a ball or tracker bar I45 for releasing the latch under the control of mechanism entirely carried by the main frame. The tracker bar I35 extends longitudinally of the main frame and is formed with mounting arms I46 and I t'i pivotally mounted as at #23 and i222 respectively on the main frame brackets itt and i3i. at idii, and is formed with a longitudinal extension it at the end of which is a return offset Hi0 having at its end a vertical extension i5! terminating in a rearwardly projecting finger lever device .452. Aspring 553 interposed between the verticai extension lfil and a pin 3 on the main frame urges the tracker bar it against position, the trackerbar will be disposed substantially in a'vertical plane as shown in Figures 9 to 12- inciusive.

in operation, when it is desired to set the right I to engage the roller I44 on the latch I30 and to release the latch nose I40 from engagement with the rack bar U. Thus the spring V will draw the margin'stop Ttoward the right until the stop plate I0'I on the margin stop '1' engages the stop projection 506 on the carriage. Then the carriage is moved to the desired right hand margin position, and the finger lever I52 is released, permitting the tracker bar I45 to return to the position shown in Figures 10 to 12, inclusive, thus allowing the latch I38 to be moved to latchin position by the spring I4I. In this way the stop T will be locked in position on the main frame formaintaining the desired right hand margin on the typed sheet. It will be observed that, when the tracker bar I45 is in its normal or state of rest position as shown in Figures 10 to 12 inclusive, there is considerable clearance or space The arm M6 is ofiset as between the tracker bar'and the roller I 44. Such powered drum I56 is journalled 'on the main frame as at iE'i, and a band or cord I58, which itself may be non-expansible, is wound partially on the drum I56, and has anunwound portion extending to the right as at 159 and around a pulley I60 journalled as at itl on the margin stop Q, the band or cord thence extending toward the left as at 52 for connection at itt to the margin stop T. The drum I56 constantly exerts a pull on the stretches I59 and 852 of the cord or band, whereby the stop Q is urged toward the left, and the stop T is urged toward the right as viewed in Figure 13. Thus the powered barrel or drum 56 cooperates with the band or cord I58 for urging the stops T and Q in a manner similar to that eflected by the spring V incorporated in the ement shown in Figures 9 to 12 inclusive. Otherwise construction and operation of the margin stops Q and T and related elements shown in Figure 13 are similar to the construction and operation of the margin stops and their related ele ments described with reference to Figures 9 to 12 inclusive, and therefore need not be referred to in detail.

The rack bar U is provided with arms W5 and H55 which mount the bar U for limited rocking movements about the front tie rod R for operatshown).

ing bell-ringing and line lock mechanism (not The bar U is urged to its normal position by a spring X, movement of the bar under the urge of the spring being limited by a stopboard, and consequent convenience.

Figures 1 to 13 inclusive bails, or tracker bars irrespective of the position of the carriage with respect to the frame. Thus the margin stop or stops may beset very easily merely by manipulating a devlceon and at the front of the frame and by moving the carriage.

The mechanisms disclosed herein embody the invention in practical and the now preferred forms, but it will be understood that various changes may be made without departing from the invention claimed.

I claim:

1. In a typewriter, a frame; a carriage mounted thereon for letter spacing and return movements; a stop on said frame; a cooperating stop adjusta bly mounted on said carriage for movement to selected positions thereon in the direction of said movement of the carriage; releasable means for securing said carriage-mounted stop in adjusted position on the carriage; and operating means cooperable with said securing means irrespective of the position of the carriage-mounted stop relative to the frame for releasing said securing means. said operating means including a carriage-mounted releasing member adapted to be moved relatively to the carriage and'into engagement with said securing means for releasing the latter, and a manually operable device mounted on the frame and being adapted to be operatively' connected to said releasing member for so moving the latter into engagement with said seeming means, said manually operable device being constrained against movement with the carriage.

- 2. In a typewriter, a frame; a carriage mounted thereon for letter spacing and returnmovements; 8. stop on said frame; a cooperating stop adjustably mounted on said carriage for movement to selected positions thereon in the direction of said movement of the carriage; releasable means for securing said carriage-mounted stop in adjusted position on the carriage; an actuator mounted on the carriage and cooperable with said securing means for releasing the latter irrespective of the position of the carriage-mounted stop on the carriage; and operating means mounted on the frame and being cooperable with said actuator irrespective of the position of the carriage on the frame.

3. In a typewriter, a frame; a carriage mounted thereon for letter spacing and return movements; 9. stop on said frame; a cooperating stop adjustably mounted on said carriage for movement to selected positions thereon in the direction of said movement of the carriage; means constantly urging said carriage-mounted stop towards said frame-mounted stop; .releasable means for securing said carriageemounted stop in adjusted position on the carriage; and operating means cooperable with said securing means irrespective of the position of the carriage-mounted stop relative to theframe for releasing said securing means, said operating means including a carriage-mounted releasing member adapted to be moved relatively to the carriage and into engagement with said'securing'means for releasing the latter, and a manually operable device mounted on the frame; and being adapted to be operatively connected to said releasing member for so moving the latter into engagement with said securing means, said manually operable device being constrained against movement with the carriage.

4. In a typewriter, a frame; a carriage mounted thereon for letter spacing and return move- .ments; 9. stop on said frame; a cooperating stop adjustably mounted on said carriage for movement to selected positions thereon in the directionof said movement of the carriage; meansconstantly urging said carriage-mounted stop towards said frame-mounted stop; releasable means for securing said carriage-mounted stop in adjusted position on the carriage; an actuator mounted on the carriage and cooperable with said securing means for releasing the latter irrespective of the position of the carriage-mounted stop on the carriage; and operating means mounted on the frame and being cooperable with said actuator irrespective of the position of the carriage on the frame. I

5. In a typewriter, a frame; a carriage-mounted thereon for 'letterspacing and return movements; a stop on said frame; a cooperating stop adjustably mounted on said carriage for movement to selected positions thereon in the direction of said movement of the carriage releasable means for securing said carriage-mounted stop in adjusted position on the carriage; operating means cooperable with said securing means irrespective of the position of the carriage-mounted stop relative to the frame for releasing said securing means, said operating means including a carriage-mounted releasing member adapted to be moved relatively to the carriage and into engagement with said securing means for releasing the latter, and a manually operable device mounted on the frame and being adapted to be operatively connected to said releasing member for so moving the latter into engagement with said securing means, said manually operable device being constrained against movement with the carriage; and releasable locking means associated with said manually operable device for maintaining said releasing member in position to maintain said securing means in released position.

6. In a typewriter, a frame; a carriage mounted thereon for letter spacing and return movements; a stop on said frame; a cooperating stop adjustably mounted on said carriage for movement to selected positions thereon in the direction of said movement of the carriage; means constantly urging said carriage-mounted stop towards said frame-mounted stop;' releasable means for securing said carriage-mounted stop in adjusted position 'on the carriage; an actuator mounted on the carriage and cooperable with said securing means for releasing the latter irrespective of the position of the carriage-mounted stop on the carriage; and control means including a manually operable element movably mounted on said frame and being adapted when moved to be operatively connected to said actuator irrespective of the position of the carriage on the frame and to move the actuator and thereby release the securing m c ans, and means cooperable with said manually operable element for releasably retaining the manually operable element in the position to which it has thus been moved.

'7. In a typewriter, a frame; a carriage mounted thereon for letter spacing and return movements; a stop on said frame; a cooperating stop adjustably mounted on said carriage for movement to selected positions thereon in the direction of said movement of the carriage; a latch on said carriage-mounted stop for releasably securing it in adjusted position on said carriage; means for moving said carriage-mounted stop on said carriage when the latch is released; a member mounted on said carriage and extending in the direc tion of adjusting movement of the carriagemounted stop and being cooperable with said latch irrespective of its position on the carriage for releasing the latch; and frame-mounted means constrained against movement with the carriage and being cooperable with said member irrespective of the position-of the carriage on the frame for operating said member to effect releasing of the latch.

8. In a typewriter, aframe; a carriage mounted thereon for letter spacing and return movements; a center stop onsaid frame; a toothed margin stop bar mounted on the carriage; right and lefthand margin stops mounted on and for adjustment along said bar respectively on opposite sides of said center stop; latches respectively mounted on said margin stops for cooperation with teeth on the bar to retain the margin stops in adjusted position; carriage mounted latch actuating means extending in the direction of movement of the margin stops on the bar and adapted to operatively engage the margin stop latches selectively in different positions of the margin stops on the bar; and frame-mounted means cooperable with said latchactuating means irrespective of the position of the carriage on the frame for releasing the latches selectively,-said frame-mounted means being constrained against movement with said carriage.

9. In a typewriter, a frame; a carriage mounted thereon for letter spacing and return movements; a center stop on said frame; a toothed margin stop bar mounted on the carriage; right and left hand margin stops mounted on andfor adjustment along said bar respectively on opposite sides of said center stop; latches respectively mounted on said margin stops for cooperation with teeth on the bar to retain the margin stops in adjusted position; carriage-mounted latch-actuating means extending in the direction of movement of the margin stops on the bar and adapted to operatively engage the latches in different positions of the margin stops on the bar; and means for operating said latch-actuating means supported entirely on the frame and normally being operatively disconnected from said latch-actuating means. i

10. In a typewriter, a frame; a carriage mounted thereon for letter spacing and return movements; a center stop on said frame; a toothed margin stop bar mounted on the carriage; right and left hand margin'stops mounted on and for pair of reciprocable links adapted respectively to engage and operate said balls to release the associated latches irrespective of the position of the carriage on the frame.

11. In a typewriter, a frame; a carriage mounted thereon for letter spacing and return movements; a center stop on said frame; a toothed margin stop bar mounted on the carriage; right and left hand margin stops mounted on and for adjustment along said bar respectively on opposite sides of said center stop; latches respectively mounted on said margin stops for cooperation with teeth on the bar to retain the margin stops in adjusted position; two carriage-mounted bails extending in the direction of movement of the margin stops on the bar and adapted to engage the margin stop latches respectively in all positions of the margin stops on the bar; and balloperating means supported entirely on the frame and normally being operatively disconnected from said bails, said bail-operating means including a pair of reciprocable links equipped with rollers adapted respectively to engage and operate said bails to release the associated latches irrespective of the position of the carriage on the frame.

12. In a typewriter, a frame; a carriage mounted thereon for letter spacing and return movements; a center stop on said frame; a toothed margin stop bar mounted on the carriage; right and left hand margin stops mounted on and for adjustment along said bar respectively on opposite sides of said center stop; latches respectively mounted on said margin stops for cooperation with teeth on the bar to I retain the margin stops in adjusted position; two

carriage-mounted bails extending in the direccrating means including a pair of reciprocable links adapted respectively to engage and operate said bails to release the associated latches irrespective of the position of the carriage on the frame; and manually operable members respectively connected to said links and extending to the front part of the frame.

13. In a typewriter, a frame; a carriage mounted thereon for letter spacing and return movements; a stop on said frame; a toothed margin stop bar on the carriage; a stop mounted on and for adjustment along said bar; a latch mounted on said carriage-mounted stopfor cooperation with teeth on the bar to retain the carriage-mounted stop in adjusted position; a carriage-mounted bail extending parallel. to the bar and below the line of movement of a part of said latch; means mounting the bail for movement upwardly to disengage the latch from the bar; and frame-mounted means engageable with the bail irrespective of the position of the carriage on the frame for lifting the bail.

14. In a typewriter, a frame element; a carriage element mounted thereon for letter spacing and return movements; 8. bar mounted on one of said elements extending in the direction of carriage movement; a margin stop mounted on and for adjustment along said bar; a member under tension connected to the bar-mounting element at one end of the bar and extending parallel to said bar past said margin stop, around a part fixed to said bar-mounting element at the other end of said bar and being attached to said margin stop; and means associated with said margin stop for releasably securing it to said bar.

15. In a typewriter, a frame element; a carriage element mounted thereon for letter spacing g and return movements; a bar mounted on one of said elements extending in the direction of carriage movement; a margin stop mounted on and for adjustment along said bar; apower-operated drum rotatably mounted on the bar-mounting u element at one end of the bar; a roller mounted on a fixed axis on the bar-mounting element at the other end of the bar; a band partially wound on said drum and having an unwound stretch extending past said margin stop, around said 11 roller, and back parallel to said bar and having its unwound end attached to said margin stop; and means associated with said margin stop for releasably securing it to said bar.

16. In a typewriter, a frame; mounted thereon for letter. spacing and return movements; a stop on said frame; a toothed margin stop baron the carriage; a stop mounted on and for adjustment along said bar; a latch mounted on said carriage-mounted stop for cooperation with teeth on the bar to retain the carriage-mounted stop in adjusted position; a carriage-mounted rail extending parallel to the bar and adjacent the line of movement of a part of said latch; means mounting the rail for movement towards the line of movement of the latch to disengage the latch from the bar; and framemounted means adapted to be operatively connected to the rail irrespective of the position of the carriage on the frame for so moving the rail. 3:

JOHN J. KIT'IEL.

a carriage 21 

